less than 1 minute read

Pythagorean theorem

Pythagorean theorem, statement that, for any right-angled triangle, the square of the hypotenuse is equal to the sum of the squares of the other two sides. The earliest known formal statement of the theorem is in the Elements of Euclid, but the basis of it was known long before this time.

See also: Geometry.

Additional topics

21st Century Webster's Family Encyclopedia21st Century Webster's Family Encyclopedia - Providence to Rafflesia